Dumping control for scrapers



y 3, 1950 K. E. REISCHL 2,508,421

DUMPING CONTROL FOR SCRAPERS Filed April 5, 1941? 2 Sheets-Sheet 1 INVENTOR,

96w fi w ATTORNEY y 1950 K. E. REISCHL 2,508,421

DUMPING C(NTROL FOR SCRAPERS Filed April 3, 1947 2 Sheets- Sheet 2 Jfwa 6.1203 66 INVENTOR,

BY W

ATTORNEY Patented May 23, 1950 TEETD is TATfES DEF-RICE "DUMBING "CONTROL JFORSGRAPERS KarLE; R'iscll'l, South Milwmikee,' Wis., asig'-nor 11:0 Bucyrus-Erie Company, :South iMiiwaukee;

W is., '-a corporation of "Delaware Application *AprilB, 1947,"SerialNo;73911150 fMy invention 'relates "to "new and useful I improvements wheeled 'scrapers of the general itgpeehown *and described 'inU. S. Patent-No. 2,321,410, 'granted June 1943, to George W. Moiket al; reference to 'whicnpa'tent is hereby made, inasrnnoh-"as this present inventionrepre- *'sents an im rovement thereon.

I, lm'ecraiiers of that type, the scraper fillsand "donors "at i ts"-front-end.

Tifx'efinain frame o'f'Su'c h a scraper is'r'iivoted ateither its from end-or rear end to a wheeled "truck, *andthe digging "and spreading depth "is "determined Way raising or iowerin'g "the other end with respect to 'asecond truck. "This is v the first 'operating' 'fnnction.

"InMoik"the'fiivoting isn't the front end, and the raising and lowering takes place 'atthe rear 'end. In my 'present invention I '"show "pivoting the rear end -and"raieing and lowering "at'the front end, buttliis" is not essential.

The digging "hl'a'de is carried rigid "with the main -"frame, thou'gh "this is "not essential.

'ikfl jacent' the digging blade is *pivoted 'a' dirteaitruiiing curved 'meniber, variously-termed. For conformity with the nomenclature of'the'Mork patent, it will here be called a bucke'tl *Swingmg 'this' bucke't "upward to dump is the second *iunchon. "Returning this bucke't to lead-carrying position is the third function.

"There is also "a front-closure, known-as the apron. Opening -"thi's' apron (when digging or flumfiing) and 'loeing i t again for earrying is the fourth *funet'ion.

Morkhas 'twocontrols "(-ropes) pone "of which "performs "the "first fnno'tion (-ne meiy depth-con- -troI), andthe other of wnioh succe'ssively *p'eri-"orms the ifouith iunction Tapromopefiing) and the secondiunction "(dumiai-ng). For tire-third frundtion "(bucket remm) Mor'k depends on "a k"-i'ckbak cam, actuated bythe-filbdfthe apron.

"It 'is the "principal *oBjectof my 'present inventionto 'emfiloy two "controls, one "of which per- "i'orm'sthe-first fu'nction -(-iieptheon'trdi) and the ather "of *whi'oh 'peri'o'rms -the iour'th function (apron opening), *and to provide an interlock between"the apron, the main frame- 2nd the "bucket, "whereby the opening of the *a pr'on will perform the second function emming) and the initial dumping movement of "the' bnket -wih be 's'low tinder a large apnlied hoisting force and 'the laterfiumpingmovement will be fastand with less applieciiorce.

addition to my'principal object eibove stated, haveworked exit =a numb'er 'df novel end sful eciintion r pregresses.

min -winch wil'if be readily"ewiiient as the dev 1 invention consists in the novel "-parlts and in the 'oomhination'emd arrangement thereof, which are-"defined in the appended claims, and fo'f -whi'ch *t-Wo emo'odiments are exemia'lifieti in the accompanying 'drawingsg vihih are hereina-f-ter particnl'arly described and =-exp1a ined Throng'hout 'the desci ipfiionfthe' same relerence number is app'i iel -'to the same member or to simiia r'menibers.

figure ii is a ver tical 1ongitndinai -section of the embodiment of -my sera'p'e'rvin carrying 'qoosit'ion.

Figure is a similar seetion ei the same embodiment er my -scraper with the apron -a1one par'lily-a-rai-sefl in dumping position.

raised in full dumping-position.

Figure isaWefiticil qongiitudinalzisection :of the second-embodiment ef -myiscraper with both "apron-and bucket raised in iulhdumping position.

"Referring mow to -Figures 1 3 we see that the impllement to"whioh l have appiiedzmyzinven- 'fliionfiin'ludewa forward truekzl ;:'25n'd";a;111921r truck 22, -sup'poi teii respectivelyon.lforward heelslfi -and rear wheeis 24. "The rearrfsrnekizesxsrigidly secur'e'd te two i'd-e piates ilfi, pireferably 'having sfibtantia ily th'e outline indicated :inrtirerfigures. -In-filaee= of either such truehiwe coiild .-tsupport one' 'en'dof the --soraper= on the: propelling wehicle. *These'pait9-c'on's'titnte parts of the'fframenfithe implement, and aremonnected together inisuch. a "way as to-enable the scraper blade 26, twhich-ris "Iocaiteii iorward of the bueket m Itof :be raise'd 01 Flowered *atwfli with respedt to fithegroundilevel. 'i-In-erder to aceemplifih this, the forward :trnck isipreferaifily provided with-rigid rearwardly *proje ing' sfd'e arms t'hat extend ilre'arwardly to amiint' abeiit'midwaey iaetweenthe two'etrucks, at when point the arms 28' are -conneete'dlbyipivot "bol tsor 131115 29 to-thesideqflatesii R-igi'diy secuned to theisidefiniatesfl5,fimrovide at the rearfithereefea remsverse lower beam 30', -'--'and=' an upper beam '31 zand rtheiafonward :end thereof a transverse be'a'm :32. STl'ie :inclined scraiper bla 'ie 26 15preferablyu igidly :secured @to "theewe' p1e3tes 25, :randecnts 'intozthezeaizthwhen the bnk 'eti zl is -beingziilled. Afijacentizthe blade 26 and preferabhy atsits rear :edgeethekbucket 21 1swivotallynnountedioma transwersezpivotebarefl. Wheat-he vbucket 71:1 :inzitne;qaositiomoimest, indicated ein lFigure 1,, "the z-n'stopibracket 1e34, eewea iby tithe smear eo'f -rbuoket, weets will be raised twice as fast as before.

3 against a bumper or bumpers on the top of lower beam 30, and this limits the downward movement of the bucket.

During the scraping operation the blade 26 is held at a low level so as to engage the dirt to be picked up, and the dirt passes over the blade into the bucket. As this takes place, an apron 31 at the forward end of the bucket is held in an elevated position: that is to say, in a partially open position so that as the dirt passes up between the lower edge 38 of the apron 3'1 and the blade 26, the dirt piling up in the bucket 21 can gravitate into the apron, after which the apron 31 can be moved to a closed position so as to retain the load. The apron is pivotally supported on side plates 25 by pivot pins 39. The loadretaining position is shown in Figure 1.

The reeving of the two control cables will now be described.

Rope 49 controls the first listed function, namely depth control, as in Mork. It passes, from a winch (not shown) over one of sheaves 4| on forward truck 2!, and thence several times around sheaves 42 on bracket 43 and sheaves 44 on cross beam 32, finally being anchored to either. Bracket 43 is mounted on forward truck 21. Drawing-in on this rope draws sheaves 42 and 44 together, thus raising the digging blade.

Rope 45, controls the fourth listed function,-

namely apron-opening. It passes, from the winch (not shown), over one of sheaves 4i, and thence several times around sheaves 46 on bracket4l and sheaves 48 on apron 31, finally being anchored to either. Bracket 41 is mounted on cross beam 32. Drawing-in on this rope 45 draws sheaves 46 and 48 together, thus raising the apron, as shown in Figure 3.

Interlock rope 49 controls the second-listed function, namely dumping. It passes from anchorage 50' on bracket 5| on one side of the main frame, then around spool or tilted sheave 52' on the end of cross beam 32 then back over sheave 53' on bracket 5|, then (see Figure 4) down over the back surface of bucket 21 to and around a series of direction-changing sheaves 54', or other curved surface, thence up to take-up sheave 55 attached to the end of take-up bolt 59 which is mounted on the back of bucket 27, and then back along a similar path, on the opposite side of the scraper, over direction-changing sheaves 54" or other curved surface, the back of bucket 21, sheave 53 on bracket 5|, spool or tilted sheave 52 on the other end of cross beam 32, and lastly to an anchorage on bracket 5|". The result of this reeving is that when the apron 31 is approximately half opened (i. e. just above open position for digging), one of sheaves 56 on I each side of the apron will engage and deflect upwardly the lower reaches 5! of rope 49, and

" be more uniform due to raising the bucket and apron at the same time. When the apron has been raised further to the position shown in Figure 2, another of sheaves 56 on each side of the apron will engage and start to deflect upwardly the upper reaches 58 of rope 49, with the result that rope 49 will now be drawn in and bucket 21 This high speed increases steadily with further deflection of both reaches of rope until the apron is fully raised and the bucket is in full dumping position (see Figure 3).

Referring now to Figure 4, it will be noted that my take-up sheave 55 serves two purposes. First, it insures that equal lifting forces will be applied to each side of the bucket at all times, even when sheaves 58 on the apron deflectrope 49 more on one side of the scraper than on the other, due to warping of the apron or accumulation of dirt on the sheaves; and if the rope on one side should break, it insures that the rope on the other side will release the bucket. Second, it makes it possible to take-up or adjust the length of rope 49 by tightening or adjusting bolt 59, and thereby prevent any lag in dumping due to a slack rope and permit adjustment to the proper tension in carry position.

Turning now to my second embodiment, which is shown in Figure 5, we see this embodiment is the same as my first embodiment, except that rope 49 is now anchored to a lower point on the scraper main frame, as at apron pivot 39. The effect of this is to lower the position of lower reach 5'! of rope 49, thereby causing the bucket to start dumping when the apron is more nearly closed. Thus the amount of opening of the apron before dumping starts can be varied for different types of digging by merely changing the anchorage to a diiferent one of several alternative points which can be made available on a single machine.

Having now described and illustrated two forms of my invention, I wish it to be understood that my invention is not to be limited to the specific form or arrangement of parts herein described and shown.

When, insome of the claims, I refer to an finterlockin means operatively connecting the bucket and apron, I intend thereby a means such that the motion of the actuated element (the bucket) is constrained or determined by the motion of the other element itself (the apron), rather than by the action of a common actuating means.

I claim:

1. In a carry-type earth-moving scraper, having ground supports, a main frame supported thereby in such manner as to. be raisable and lowerable, a digging blade carried by the main frame, means to raise and lower the main frame and thereby the digging blade, a dirt-retaining bucket capable of being shifted to dump, a front apron capable of being shifted to dump, and means to shift the apron to dump; the combine.- tion therewith of interlocking means operatively connecting the bucket to the main frame and to the apron in such a way that whenever the apron is shifted beyond partial dumping position toward full dumping position, the apron will cause the interlocking means to dump the bucket, said interlocking means including two reaches of rope rigged 0n the main frame in such a manner that one reach is lengthened by the apron by shifting the apron for initial slow and forceful shifting of the bucket, and both reaches are so lengthened for later fast and less forceful shifting of the bucket.

2. A scraper according to claim 1, further characterized by the fact that the apron shifts the bucket to dump by upwardly deflecting one and then both of said reaches of rope.

3. In a carry-type earth-moving scraper, having ground supports, a main frame supported thereby in such manner as to be raisable and lowerable, a digging blade carried by the main frame, means to raise and lower the main frame and thereby the digging blade, a dirt-retaining bucket pivoted on the main frame adjacent the blade and capable of being tilted forwardly and upwardly to dump, a front apron pivoted on the main frame and capable of being moved upwardly to dump, and means to thus move the apron to dump; the combination therewith of interlocking means operatively connecting the bucket to the main frame and to the apron in such a way that whenever the apron is shifted beyond partial dumping position toward full dumping position, the apron will cause the interlocking means to dump the bucket, said interlocking means including a plurality of vertically spaced reaches of rope extending from operative association with the bucket to a portion of the scraper with respect to which the apron is relatively movable during its upward dumping movement, and of means carried by the apron to successively engage these reaches as the apron is raised to dump.

4. In a carry-type earth-moving scraper, having ground supports, a main frame supported thereby in such manner as to be raisable and lowerable, a digging blade carried by the main frame, means to raise and lower the main frame 8 and thereby the digging blade, a dirt-retaining bucket capable of being shifted to dump, a front apron capable of being shifted to dump, and means to shift the apron to dump; the combination therewith of interlocking means operatively connecting the bucket to the main frame and to the apron in such a way that whenever the apron is shifted beyond partial dumping position toward full dumping position, the apron will cause the interlocking means to dump the bucket, said interlocking means including a plurality of vertically spaced reaches of rope so located on the main frame as to be successively engaged by the apron as the apron is shifted to dump.

KARL E. REISCHL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,301,604 Zahara Nov. 10, 1942 2,304,076 Davidson et a1. Dec. 8, 1942 2,305,481 Le Bleu Dec. 15, 1942 2,330,113, Daniels Sept. 21, 1943 

